SE9502419L - Preparation of polysulfide by oxidation of sulfide-enriched green liquor - Google Patents

Preparation of polysulfide by oxidation of sulfide-enriched green liquor

Info

Publication number
SE9502419L
SE9502419L SE9502419A SE9502419A SE9502419L SE 9502419 L SE9502419 L SE 9502419L SE 9502419 A SE9502419 A SE 9502419A SE 9502419 A SE9502419 A SE 9502419A SE 9502419 L SE9502419 L SE 9502419L
Authority
SE
Sweden
Prior art keywords
polysulfide
sulfide
oxidation
preparation
green liquor
Prior art date
Application number
SE9502419A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE9502419D0 (en
SE507033C2 (en
Inventor
Martin Wimby
Olle Wennberg
Original Assignee
Kvaerner Pulping Tech
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kvaerner Pulping Tech filed Critical Kvaerner Pulping Tech
Priority to SE9502419A priority Critical patent/SE507033C2/en
Publication of SE9502419D0 publication Critical patent/SE9502419D0/en
Priority to CA002230572A priority patent/CA2230572A1/en
Priority to PCT/SE1996/000832 priority patent/WO1997002383A1/en
Publication of SE9502419L publication Critical patent/SE9502419L/en
Priority to US09/010,504 priority patent/US5993601A/en
Publication of SE507033C2 publication Critical patent/SE507033C2/en

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0064—Aspects concerning the production and the treatment of green and white liquors, e.g. causticizing green liquor
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0057—Oxidation of liquors, e.g. in order to reduce the losses of sulfur compounds, followed by evaporation or combustion if the liquor in question is a black liquor
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0085—Introduction of auxiliary substances into the regenerating system in order to improve the performance of certain steps of the latter, the presence of these substances being confined to the regeneration cycle

Landscapes

  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Abstract

The invention relates to a process for producing polysulphide by means of oxidizing sulphide in spent liquors from kraft cellulose cooking. The process is characterized in that green liquor is firstly enriched in sulphide and then oxidized.
SE9502419A 1995-07-04 1995-07-04 Preparation of polysulfide by oxidation of sulfide in green liquor SE507033C2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
SE9502419A SE507033C2 (en) 1995-07-04 1995-07-04 Preparation of polysulfide by oxidation of sulfide in green liquor
CA002230572A CA2230572A1 (en) 1995-07-04 1996-06-24 Process for producing polysulphide by means of oxidizing sulphide in spent liquors from kraft cellulose cooking
PCT/SE1996/000832 WO1997002383A1 (en) 1995-07-04 1996-06-24 Process for producing polysulphide by means of oxidizing sulphide in spent liquors from kraft cellulose cooking
US09/010,504 US5993601A (en) 1995-07-04 1998-01-21 Process for producing polysulphide by means of oxidizing sulphide in spent liquors from kraft cellulose cooking

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9502419A SE507033C2 (en) 1995-07-04 1995-07-04 Preparation of polysulfide by oxidation of sulfide in green liquor

Publications (3)

Publication Number Publication Date
SE9502419D0 SE9502419D0 (en) 1995-07-04
SE9502419L true SE9502419L (en) 1997-01-05
SE507033C2 SE507033C2 (en) 1998-03-16

Family

ID=20398841

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9502419A SE507033C2 (en) 1995-07-04 1995-07-04 Preparation of polysulfide by oxidation of sulfide in green liquor

Country Status (4)

Country Link
US (1) US5993601A (en)
CA (1) CA2230572A1 (en)
SE (1) SE507033C2 (en)
WO (1) WO1997002383A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2592186A1 (en) * 2011-11-08 2013-05-15 Södra Cell AB Kraft pulping process
FI128221B (en) 2015-04-27 2019-12-31 Metsae Fibre Oy Method for regenerating a catalyst used for producing polysulphide lye

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1112081A1 (en) * 1983-05-30 1984-09-07 Всесоюзное Ордена Трудового Красного Знамени Научно-Производственное Объединение Целлюлозно-Бумажной Промышленности Method for preparing alkaline cooking solution for producing cellulose polysulfide
US5082526A (en) * 1989-01-23 1992-01-21 Pulp And Paper Research Institute Of Canada Process of producing kraft pulping liquor by the oxidation of white liquor in the presence of lime mud
SE500748C2 (en) * 1992-10-12 1994-08-22 Bertil Pettersson Chemical recycling process in a sulphate pulp mill for the production of a high-sulfide white liquor and a low-sulfide white liquor
FI98538C (en) * 1993-10-20 1997-07-10 Enso Gutzeit Oy Process for the preparation of sodium hydroxide from white liquor

Also Published As

Publication number Publication date
SE9502419D0 (en) 1995-07-04
US5993601A (en) 1999-11-30
WO1997002383A1 (en) 1997-01-23
SE507033C2 (en) 1998-03-16
CA2230572A1 (en) 1997-01-23

Similar Documents

Publication Publication Date Title
FI855038A0 (en) FLERSTEGSFOERFARANDE FOER BLEKNING AV HOEGUTBYTES- OCH ULTRAHOEGUTBYTESMASSOR.
JPS5725490A (en) Bleaching of cellulose pulp by oxygen gas
NO854446L (en) PROCEDURE FOR REGULATING Oxygen Bleaching Process for Cellulose.
FI943753A (en) Production process of oxidized white liquor
ATE189277T1 (en) SELECTIVE OXYDATION OF WHITE LYE
JPS56169889A (en) Oxygen bleaching method of cellulose pulp
SE9502419L (en) Preparation of polysulfide by oxidation of sulfide-enriched green liquor
ES2091127T3 (en) A METHOD OF PRODUCING GREEN BLEACH IN CHEMICAL RECOVERY IN SULPHATE AND SULPHITE PAPER MILLS.
JPS5721589A (en) Bleaching of cellulose pulp by oxygen gas
CA2118463A1 (en) Method of producing sodium hydroxide from white liquor
SE8405061L (en) SET TO MAKE CELLULOSAMASSA
SE9203122L (en) Peroxide bleaching of sulfate pulp with the addition of magnesium before bleaching
ATE5268T1 (en) PROCESS AND MIXTURE FOR PRODUCTION OF CELLULOSE PULP.
SE9502418L (en) Preparation of polysulfide by oxidation of sulfide with green sludge as catalyst
AU2202188A (en) Method of bleaching or delignification of cellulose pulp with oxygen
NO950954L (en) Method of mass bleaching
NO883968L (en) PROCEDURE FOR PAPER PREPARATION.
SE9501287D0 (en) Electrochemical process
SU1146345A1 (en) Method of oxidizing white liquor of sulfate pulp production
SE8505899L (en) RECOVERABLE REDUCING BLEACH
SE8006737L (en) SET TO MAKE GREASE PREPARATION RESPECTIVE GREASE PAPER
FI914252A (en) Preparation of cellulose pulp
JPS52132549A (en) Method of oxidizing black liquor during kraft pulp production process
RU92012359A (en) METHOD OF OBTAINING OXIDATED WHITE LIQUE
ES2004389A6 (en) Production of bleached pulp by oxygen/alkali extractant

Legal Events

Date Code Title Description
CANC Patent cancelled, revoked after opposition
NUG Patent has lapsed